TCB630DPK Direction Plus TransChill Transmission Cooler Kit forNissan Navara 2.3L (2015-on) NP300 Turbo Diesel 4Cyl YS23 DI DOHC 16Vg> 4JJ1-TC/TCX (2012-2020)Isuzu MU-X 3.0L 4JJ1-TC/TCX (2013-2020)Benefits of the 32mm TransChill Transmission Oil Cooler:An effective and economical way to keep the transmission at its optimum operating temperature.High efficiency turbulators in each tube direct the fluid for superior heat transfer. The unique 32mm plate and fin design allows for extreme cooling whilst the compact design is perfect for vehicle specific mounting. Thicker cooler which holds 500ml of ATF (previous 120ml) More efficient than the 19mm (by approx.